Vol. 7, Issue 4 (2019)
Pathogenesis related proteins act as a plant defence mechanism
Author(s): Barad AJ, Singh SK, Bhagora GJ and Patel MB
Abstract: Plant have several types of defence mechanism against the pathogen attack which include wax, cuticle, cell wall composition, phytoanticipin, cork layer formation, abscission layer, tylose formation, lignification of cell wall, production of Pathogenesis-Related proteins (PRPs), hypersensitive response, phytoalexins. Among which one of the most important plant defence mechanism is synthesized or induce of Pathogenesis-Related protien in plant after pathogen attack. PRPs are definition as the proteins that are induced specifically in response to infection by pathogen and which is encoded by a host plant’s genome and are associated with the development to systemic acquired resistance (SAR). They are low-molecular weight proteins (643 kda), stable at low pH, thermo stable and selectively extractable. It’s involved in the pathogen recognition and release defence trigger molecules by the infesting pathogen. Others are responsible for signals which are disclose message of the infection to adjacent cells. Seventeen families of PRPs have been recognized. These are chitinases, β-1, 3-glucanase, thaumatin, proteinase-inhibitors, endochitinases, peroxidase, ribonucleic, defensin, thionin, Lipid-Transferase Proteins (LTP), oxalate oxidase and oxalate oxidase like etc. PRPs aggregated in the vacuole and in the intercellular space. The intercellular PRPs present first line of defence to a infecting pathogen and if this break down, the release of second line defence which are vacuolar PRPs, bury pathogen with lytic enzyme, which have antifungal, antibacterial and antiviral activity. These PRPs directly induce the defence activity of plant by attacking particle in the fungus cell wall or bacterium cell wall. Some PRPs indirectly induce the defence activity of plant as lignification of cell wall. Hence, here this review paper provides an overview on the PRPs: classification, role in various biotic and abiotic conditions as well as in plant defence mechanism pathways. We also reviewed some successful case studies related to role of PRPs in plant defence mechanism.
Pages: 1339-1345 | 268 Views 58 Downloads
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How to cite this article:
Barad AJ, Singh SK, Bhagora GJ, Patel MB. Pathogenesis related proteins act as a plant defence mechanism. Int J Chem Stud 2019;7(4):1339-1345.
